package com.sky.service.impl;

import com.sky.entity.Orders;
import com.sky.mapper.OrderMapper;
import com.sky.mapper.UserMapper;
import com.sky.service.ReportService;

import com.sky.vo.TurnoverReportVO;
import com.sky.vo.UserReportVO;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.lang.StringUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import javax.annotation.Resource;
import java.time.LocalDate;
import java.time.LocalDateTime;
import java.time.LocalTime;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

@Service
@Slf4j
public class ReportServiceImpl implements ReportService {
    @Autowired
    private OrderMapper orderMapper;
    @Autowired
    private UserMapper userMapper;
    /**
     * 统计指定时间区间内的营业额数据
     * @param begin
     * @param end
     * @return
     */
    @Override
    public TurnoverReportVO getTurnoverStatistics(LocalDate begin, LocalDate end) {
        List<LocalDate> dateList=new ArrayList<>();
        dateList.add(begin);
        while(!begin.equals(end)){
            //日期计算，计算指定日期的后一天对应的日期
            begin=begin.plusDays(1);
            dateList.add(begin);
        }
        //初始化营业额列表
        List<Double> turnoverList=new ArrayList<>();
        for (LocalDate date : dateList) {
            //查询date日期对应的营业额数据，营业额是指状态为已完成的订单金额合计
            LocalDateTime beginTime=LocalDateTime.of(date, LocalTime.MIN);
            LocalDateTime endTime=LocalDateTime.of(date, LocalTime.MAX);
            //select sum(amount) from orders where order_time>=? and order_time<? and status=5
            Map map=new HashMap();
            map.put("begin",beginTime);
            map.put("end",endTime);
            map.put("status", Orders.COMPLETED);
            Double turnover=orderMapper.sumByMap(map);
            turnover=turnover==null?0.0:turnover;
            turnoverList.add(turnover);
        }
        //封装返回结果
        return TurnoverReportVO.builder()
                .dateList(StringUtils.join(dateList,","))
                .turnoverList(StringUtils.join(turnoverList,","))
                .build();
    }

    public UserReportVO getUserStatistics(LocalDate begin, LocalDate end) {
        List<LocalDate> dateList=new ArrayList<>();
        dateList.add(begin);
        while(!begin.equals(end)){
            //日期计算，计算指定日期的后一天对应的日期
            begin=begin.plusDays(1);
            dateList.add(begin);
        }
        //存放每天的用户总量select count(id) from user where create_time<?
        List<Integer> totalUserList=new ArrayList<>();
        //存放每天的新增用户数量select count(id) from user where create_time>=? and create_time<?
        List<Integer> newUserList=new ArrayList<>();
        for (LocalDate date : dateList) {
            LocalDateTime beginTime=LocalDateTime.of(date, LocalTime.MIN);
            LocalDateTime endTime=LocalDateTime.of(date, LocalTime.MAX);
            //查询date日期对应的用户总量数据
            Map map=new HashMap();
            map.put("end",endTime);
            Integer totalUser=userMapper.countByMap(map);
            totalUserList.add(totalUser);
            //查询date日期对应的新增用户数量数据
            map.put("begin",beginTime);
            Integer newUser=userMapper.countByMap(map);
            newUserList.add(newUser);
        }
        //封装返回结果
        return UserReportVO.builder()
                .dateList(StringUtils.join(dateList,","))
                .totalUserList(StringUtils.join(totalUserList,","))
                .newUserList(StringUtils.join(newUserList,","))
                .build();
    }
}